Laser beat wave excitation of surface plasma wave and material ablation

D. B. Singh, V. K. Tripathi

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Two coplanar laser beams of frequencies ω1 and ω2, impinged on a metal surface at angles of incidence θ and -θ, resonantly excite a surface plasma wave (SPW) at the difference frequency ω=ω12 when ω has a specific value ω=ωR(θ), where ωr depends on ω12, θ and plasma frequency of the metal. The lasers exert a ponderomotive force on electrons in the skin layer and drive the SPW. The latter heats the electrons efficiently, causing efficient ablation of the material. The reduction in laser pulse lengths results in reducing the efficiency of SPW excitation and ablation.

Original languageEnglish
Article number103115
JournalPhysics of Plasmas
Issue number10
StatePublished - 2007
Externally publishedYes


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